./file0uvm_fault(0xfffffd806f3ede68, 0xf, 0, 1) -> e kernel: page fault trap, code=0 Stopped at ktrops+0x58: movq 0x10(%r14),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND *516637 32788 0 0 0x4000000 0 syz-executor ktrops(ffff800031d002c8,ffffffffffffffff,0,a0c7df9f,fffffd80668976d8,fffffd8007bfd3a8) at ktrops+0x58 ktrcanset sys/kern/kern_ktrace.c:727 [inline] ktrops(ffff800031d002c8,ffffffffffffffff,0,a0c7df9f,fffffd80668976d8,fffffd8007bfd3a8) at ktrops+0x58 sys/kern/kern_ktrace.c:570 doktrace(fffffd80668976d8,4,20c7df9f,0,ffff800031d002c8) at doktrace+0x6bd ktrsetchildren sys/kern/kern_ktrace.c:595 [inline] doktrace(fffffd80668976d8,4,20c7df9f,0,ffff800031d002c8) at doktrace+0x6bd sys/kern/kern_ktrace.c:517 sys_ktrace(ffff800031d002c8,ffff80003ca4af90,ffff80003ca4aee0) at sys_ktrace+0x11c sys/kern/kern_ktrace.c:558 syscall(ffff80003ca4af90) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003ca4af90) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x26a32c3cad0, count: 10 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.